<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Promise.race</title>
</head>
<body>
    <script>
       //了解一下 race 赛跑
       /**
        * race 
        * 参数: promise 实例对象的数组
        * 返回: promise 实例对象
        *   状态和结果值由数组中最先改变状态的 promise 实例决定
        */
        let p1 = new Promise((resolve, reject) => {
            setTimeout(() => {
                resolve('OK');
            }, 10);
        });

        // let p2 = Promise.resolve('Success');
        let p2 = Promise.reject('NoNoNo');

        let p3 = Promise.resolve('Wa Oh Wa Oh');

        let result = Promise.race([p1, p2, p3]);

        console.log(result);
    </script>
</body>
</html>